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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 :
21 : // must be first
22 : #include <canvas/debug.hxx>
23 : #include <tools/diagnose_ex.h>
24 : #include <canvas/verbosetrace.hxx>
25 :
26 : #include <discreteactivitybase.hxx>
27 :
28 :
29 : namespace slideshow
30 : {
31 : namespace internal
32 : {
33 0 : DiscreteActivityBase::DiscreteActivityBase( const ActivityParameters& rParms ) :
34 : ActivityBase( rParms ),
35 : mpWakeupEvent( rParms.mpWakeupEvent ),
36 : maDiscreteTimes( rParms.maDiscreteTimes ),
37 : mnSimpleDuration( rParms.mnMinDuration ),
38 0 : mnCurrPerformCalls( 0 )
39 : {
40 0 : ENSURE_OR_THROW( mpWakeupEvent,
41 : "DiscreteActivityBase::DiscreteActivityBase(): Invalid wakeup event" );
42 :
43 0 : ENSURE_OR_THROW( !maDiscreteTimes.empty(),
44 : "DiscreteActivityBase::DiscreteActivityBase(): time vector is empty, why do you create me?" );
45 :
46 : #ifdef DBG_UTIL
47 : // check parameters: rDiscreteTimes must be sorted in
48 : // ascending order, and contain values only from the range
49 : // [0,1]
50 : for( ::std::size_t i=1, len=maDiscreteTimes.size(); i<len; ++i )
51 : {
52 : if( maDiscreteTimes[i] < 0.0 ||
53 : maDiscreteTimes[i] > 1.0 ||
54 : maDiscreteTimes[i-1] < 0.0 ||
55 : maDiscreteTimes[i-1] > 1.0 )
56 : {
57 : ENSURE_OR_THROW( false, "DiscreteActivityBase::DiscreteActivityBase(): time values not within [0,1] range!" );
58 : }
59 :
60 : if( maDiscreteTimes[i-1] > maDiscreteTimes[i] )
61 : ENSURE_OR_THROW( false, "DiscreteActivityBase::DiscreteActivityBase(): time vector is not sorted in ascending order!" );
62 : }
63 :
64 : // TODO(E2): check this also in production code?
65 : #endif
66 0 : }
67 :
68 0 : void DiscreteActivityBase::startAnimation()
69 : {
70 : // start timer on wakeup event
71 0 : mpWakeupEvent->start();
72 0 : }
73 :
74 0 : sal_uInt32 DiscreteActivityBase::calcFrameIndex( sal_uInt32 nCurrCalls,
75 : ::std::size_t nVectorSize ) const
76 : {
77 0 : if( isAutoReverse() )
78 : {
79 : // every full repeat run consists of one
80 : // forward and one backward traversal.
81 0 : sal_uInt32 nFrameIndex( nCurrCalls % (2*nVectorSize) );
82 :
83 : // nFrameIndex values >= nVectorSize belong to
84 : // the backward traversal
85 0 : if( nFrameIndex >= nVectorSize )
86 0 : nFrameIndex = 2*nVectorSize - nFrameIndex; // invert sweep
87 :
88 0 : return nFrameIndex;
89 : }
90 : else
91 : {
92 0 : return nCurrCalls % nVectorSize ;
93 : }
94 : }
95 :
96 0 : sal_uInt32 DiscreteActivityBase::calcRepeatCount( sal_uInt32 nCurrCalls,
97 : ::std::size_t nVectorSize ) const
98 : {
99 0 : if( isAutoReverse() )
100 0 : return nCurrCalls / (2*nVectorSize); // we've got 2 cycles per repeat
101 : else
102 0 : return nCurrCalls / nVectorSize;
103 : }
104 :
105 0 : bool DiscreteActivityBase::perform()
106 : {
107 : // call base class, for start() calls and end handling
108 0 : if( !ActivityBase::perform() )
109 0 : return false; // done, we're ended
110 :
111 0 : const ::std::size_t nVectorSize( maDiscreteTimes.size() );
112 :
113 : // actually perform something
114 : // ==========================
115 :
116 : // TODO(Q3): Refactor this mess
117 :
118 : // call derived class with current frame index (modulo
119 : // vector size, to cope with repeats)
120 : perform( calcFrameIndex( mnCurrPerformCalls, nVectorSize ),
121 0 : calcRepeatCount( mnCurrPerformCalls, nVectorSize ) );
122 :
123 : // calc next index
124 0 : ++mnCurrPerformCalls;
125 :
126 : // calc currently reached repeat count
127 0 : double nCurrRepeat( double(mnCurrPerformCalls) / nVectorSize );
128 :
129 : // if auto-reverse is specified, halve the
130 : // effective repeat count, since we pass every
131 : // repeat run twice: once forward, once backward.
132 0 : if( isAutoReverse() )
133 0 : nCurrRepeat /= 2.0;
134 :
135 : // schedule next frame, if either repeat is indefinite
136 : // (repeat forever), or we've not yet reached the requested
137 : // repeat count
138 0 : if( !isRepeatCountValid() ||
139 0 : nCurrRepeat < getRepeatCount() )
140 : {
141 : // add wake-up event to queue (modulo
142 : // vector size, to cope with repeats).
143 :
144 : // repeat is handled locally, only apply acceleration/deceleration.
145 : // Scale time vector with simple duration, offset with full repeat
146 : // times.
147 :
148 : // Somewhat condensed, the argument for setNextTimeout below could
149 : // be written as
150 :
151 : // mnSimpleDuration*(nFullRepeats + calcAcceleratedTime( currentRepeatTime )),
152 :
153 : // with currentRepeatTime = maDiscreteTimes[ currentRepeatIndex ]
154 :
155 : // Note that calcAcceleratedTime() is only applied to the current repeat's value,
156 : // not to the total resulting time. This is in accordance with the SMIL spec.
157 :
158 : mpWakeupEvent->setNextTimeout(
159 : mnSimpleDuration*(
160 : calcRepeatCount(
161 : mnCurrPerformCalls,
162 0 : nVectorSize ) +
163 : calcAcceleratedTime(
164 : maDiscreteTimes[
165 : calcFrameIndex(
166 : mnCurrPerformCalls,
167 0 : nVectorSize ) ] ) ) );
168 :
169 0 : getEventQueue().addEvent( mpWakeupEvent );
170 : }
171 : else
172 : {
173 : // release event reference (relation to wakeup event
174 : // is circular!)
175 0 : mpWakeupEvent.reset();
176 :
177 : // done with this activity
178 0 : endActivity();
179 : }
180 :
181 0 : return false; // remove from queue, will be added back by the wakeup event.
182 : }
183 :
184 0 : void DiscreteActivityBase::dispose()
185 : {
186 : // dispose event
187 0 : if( mpWakeupEvent )
188 0 : mpWakeupEvent->dispose();
189 :
190 : // release references
191 0 : mpWakeupEvent.reset();
192 :
193 0 : ActivityBase::dispose();
194 0 : }
195 : }
196 0 : }
197 :
198 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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